body {
	font: 12px arial;
}

header {
	overflow: hidden;
}

header nav {
	width: 400px;
	float: right;
}

header nav a {
	margin-left: 15px;
}


/*主体部分*/

.content {
	text-align: center;
}

.content img {
	width: 270px;
	height: 129px;
}

.content input {
	width: 450px;
	height: 34px;
}

.content button {
	width: 100px;
	height: 40px;
}


/*底部信息*/

footer {
	padding-top: 200px;
}

footer p {
	text-align: center;
}